<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.a{
				width: 200px;
				height: 200px;
				float:right;
				background-color:pink;
				text-align: center;
				margin-top: 100px;
			}
			.b{
				width: 100px;
				height: 100px;
			}
			.b{
				background-color:navajowhite;
				width: 100px;
				height: 100px;
			}
		</style>
	</head>
	<body>
		<div class="a">今天是个好天气
		<div class="b">哈哈</div></div>
		
		<div class="b">花花</div>
		<div class="b">左左右右</div>
	</body>
</html>
